World-specific Power Ideas?

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I'm rewriting an old story/roleplay and I've hit a deadend in my ideas reservoir.
Here's a bit more explanation,
There's four major bloodlines, established several centuries ago, that each presently have some kind of ability crucial to the development of the roleplay's plot (except for one, that's the problem :'D). The original four who started these bloodlines, blessed by their god to protect its followers and quell the "evil" in the world, started an organization called Silver Stars (SS) and, centuries later, the bloodlines are still present and prominent in SS.
Anyone who's a descendant of these bloodlines can summon a weapon blessed by their god, of which is the only thing able to harm nightmares, the aforementioned evil.
There's this thing called the astral plane (because I'm just so good at naming things) where the nightmares reside.

The four main bloodlines & their respective abilities are:
Ephemeris: the only bloodline able to sleep and "dream" to transport themselves to the astral plane. Because of this, until recently, only ephemeris descendants were able to access the astral plane and are still, in turn, referred to as the "warriors of silver stars". For the most part they all summon weapons designed to cause the most damage possible to nightmares as a result of Ephemeris's history.
Sidereal: gifted with anything from foresight, to being able to receive visions or interact with SS's god directly.
Quasar: overly powerful summons with the tendency to "erode the mind" as my friend so graciously put it, or just cause the user to go insane. <-- semi-rare occurrence, really. just really powerful summons

Zenith is the only bloodline without something interesting, and I don't just want to scrap it. 4 is my minimum for the bloodlines because players aren't really going to be able to sign up as a quasar descendant AND I don't just want to leave them with two main bloodlines to pick from.

This is written more as a playable roleplay setting than a book, which is why I'm so dead-set on getting all of these bloodlines fleshed out with something interesting for players to mess with instead of just leaving it blank for later in the story.

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I would recommend void where everything they use the power on just deletes into a void no one can go into

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@Jujub_811
oooh wait, similar to a black hole except it doesn't try to aggressively absorb everything around it?

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@Plus4 yeah

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It would probably be OP though

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@Jujub_811
oh yeah it honestly would be OP like that but I can fenagle it to be nicer. I've already got ideas for it, so very much thank you :D

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@Plus4 your welcome

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@Plus4 is it fine if we talk about more powers

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I have a lot of suggestions

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@Jujub_811
Sorry for the late response, but yeah! I'd love to!

Evil Overlord

when i read the title i thought of speech (i misread world as word) based powers so, audium: a bloodline dying out, with the ability ti cast verbal commands onto people or objects, such as forcing them to do certain actions(i.e run, forcing someone to drop an item,blahblahblah), at the cost of, the greater the strength of the command, the greater reprecussion on the user, (with the exception of inanimate objects) which causes them immense pain nd makes the power unusable fr a while. (wait did i just copy cursed speech from jjk?....[censored].)

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@limbus
oooh that's a cool one. I don't know what jjk is but you're all good :D it'd work sort of like telepathy but with mandatory commands, yeah? Or were you thinking more like the victim just has sudden impulses rather than they're told to do something?

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@Plus4 gravity and bubbles

Evil Overlord

@Plus4 i feel like its closer to telepathy with mandatory commands yea

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@Jujub_811
like separate words or gravity bubbles /curious
both would be interesting; i forget how much you can do with bubbles
(do you mayhaps want to take this over to DMs or stay here? ^_^)

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@limbus
got it, thank you!

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@Plus4 dms